Occupancy sensor and method of operating same

Details Occupancy sensor and method of operating same Occupancy sensor and method of operating same

G - Physics

05

B

G05B 15/02 (2006.01) H05B 37/02 (2006.01)

Patent

CA 2562143

A multiple sensing technology-based occupancy sensor. Ultrasonic and infrared sensors are used to produce first and second occupancy estimator signals that are combined using a fusion based detection algorithm to produce a combined estimator signal. The combined estimator is then used to switch electrical loads when the combined estimator signal is above a predetermined threshold. The result is an occupancy sensor that has a very high probability of occupancy detection and a low probability of false tripping. In addition, infrared sensitivity is adjusted based upon an estimation of the background noise in order to minimize the occurrence of false tripping.

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